Microsoft Corp
One Microsoft Way
Redmond, WA 98052
US
It's not just an address, it's a way of life.
... but then, all software is.
So, what's IBM's address?
IBM HQ Earth
or, the mailing address from their website...
IBM Corporation
1133 Westchester Avenue
White Plains, New York 10604
United States
So, what's Apple's address? See OneInfiniteLoop.
And while we're on the subject, where do Oracle reside? (aside from Auckland, New Zealand http://www.oracleracing.com/)
World Headquarters
Redwood Shores
Oracle Corporation
500 Oracle Parkway
Redwood Shores CA
What's Seagate's Address?
Seagate Technology, LLC.
920 Disc Drive
Scotts Valley, CA 95067-0360
See also: WindowsWay